The Supreme Court decision in the Hobby Lobby case doesn't currently affect the birth control methods that are most commonly used. But Planned Parenthood Federation of America spokeswoman Justine Sessions says the decision "opens the door for other corporations to be able to opt out of providing any form of birth control."

It doesn't affect:

• Most birth control pills

• Condoms

• Sponges

• Sterilization

It does affect:

• Plan B "morning-after pill"

• Ella "morning-after pill"

• Hormonal and copper intrauterine devices (IUDs)

The companies in the case and their supporters object to IUDs and morning-after pills, saying they cause abortions by blocking a fertilized egg from implanting in the uterus. Groups that lobby for reproductive rights contend the drugs and devices prevent fertilization from occurring, which can lead to unwanted pregnancies and surgical abortions.

Supporters of employer-paid birth control rally in front of the Supreme Court. The court ruled 5-4 that requiring Hobby Lobby to pay for insurance coverage for some contraception under the Affordable Care Act violated a federal law protecting religious freedom. (Photo: Chip Somodevilla, Getty Images)